|Publication number||US6415947 B1|
|Application number||US 09/667,007|
|Publication date||Jul 9, 2002|
|Filing date||Sep 21, 2000|
|Priority date||Jul 15, 2000|
|Also published as||CN1136130C, CN1333168A, DE60009051D1, DE60009051T2, EP1172304A1, EP1172304B1|
|Publication number||09667007, 667007, US 6415947 B1, US 6415947B1, US-B1-6415947, US6415947 B1, US6415947B1|
|Original Assignee||Hana Cobi Co., Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (65), Classifications (19), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Field of the Invention
The present invention relates to a plastic made, rectangular airtight container for food.
2. Related Art
As a container for housing and storing food, a plastic made airtight container 101 as shown in FIG. 4 to FIG. 6 is widely used.
This plastic made airtight container 101 consists, of container main body 103 and lid 102, a plurality of locking projections 110 projected at top portion of the container main body 103, and locking wing pieces 105 which are folded and unfolded around hinge 106. The wing pieces rotatively move around hinge 106 which are formed integrally with the top lid surface 104 of the lid 102. Locking holes 107 are inserted and locked to locking projections 110 formed to lock with the wing pieces 105 at a position corresponding to each locking projection 110.
A recess 111 is formed in the top lid surface 104 of lid 102 which is adapted to engage with the top edge 113 of the container main body 103. A packing 112 can be inserted into groove 111.
Accordingly, when the lid 102 is placed on the container main body 103 and a finger pressing portion 105 a is pressed by a finger, i. e., when the locking wing piece 105 is pressed toward the locking projection 110 of the container main body 103, the locking projections 110 are locked by passing them through locking holes 107 a nd 107 b, respectively. Since the top edge 113 presses against the packing 112, the interior space 114 of the container main body 103 is hermetically sealed from the exterior.
However, in accordance with above described airtight container 101, the locking wing piece 105 is connected by a hinge 106 which is decreased very much in thickness, and since the hinge 106 has to be folded and unfolded by the locking wing piece 105, a bending stress is repeatedly produced and therefore is very weak.
On the other hand, as shown in drawings, in the case of an elongated rectangular airtight container 101, and in the case where the length of one side is more than 10 cm, the locking hole 107 of the locking wing piece 101 and the locking projection 110 of the container main body 103 are made to be two on each side so as to secure a sufficient locking force and a uniformity of the hermetical sealing force (airtight force).
In the case of a rectangular airtight container 101 with a lid 102, since a plastic molten liquid pouring gate 115 is formed to an injection metal mold corresponding to the right center of the lid 102, in the process in which the plastic molten liquid spreads out in every direction from the molten liquid pouring gate 115 and fills up the cavity of metal mold by which the lid 102 is made, the traveling time in which the plastic molten liquid is spread to each end terminal portion of the mold is different, and since the molten liquid flows in counter current directions to itself, collisions of the molten liquid forms weld lines, and strength weakened portions.
Since both end terminal portions 105 b of the locking wing piece 105 are most distanced from the molten liquid pouring gate 115 whereby the molten liquid traveling time is the longest, and since the gorge portion 105 b is formed due to the locking hole 107, the gorge portion 105 b operates as a resistive means for the flow of molten liquid, whereby the flow of the molten liquid flow becomes stagnated. On the other hand, for a center portion between both side locking holes 107, since the distance from the molten liquid pouring gate 115 is closer and the clearance is greater and the flowing resistance is less, the flow of molten liquid becomes smooth whereby the flow of molten liquid occurs as shown by arrows. Thus, the molten liquid collides with itself at the hinge end portion 106a which is the end terminal portion of the hinge 106, thereby forming a weld line. (Generally the weld line is formed at the hinge end terminal portion at a rate of 5-15%).
When a weld line is formed by the collision of the molten liquid, at the hinge end portion 106 a, a thin hinge end portion 106 a forms a cracked portion which is easily torn out and damaged when locking the wing piece portion 105 is repeatedly folded and unfolded. Once the hinge end portion 106 a is torn out, even just a little, it continuously spreads out whereby the life of the airtight container 101 is considerably decreased, and this dissatisfaction of the consumer has been pointed out as a significant problem. Since this inferiority of product cannot be confirmed at manufacturing state, and since the problem would appear only after a predetermined time is past while the consumer is using the product (but in a further short time than regular life of the product), this problem is a big issue for consumer protection.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
FIG. 1 is a view showing the lid of a plastic airtight container for food in accordance with the present invention;
FIG. 2 is a cross sectional view of the lid of FIG. 1;
FIG. 3 is a view showing a rectangular airtight container comprising an assembled lid and container main body, in accordance with the present invention; and
FIG. 4 to FIG. 6 are views showing a conventional, rectangular airtight container.
Accordingly, it is an object of the present invention to provide a plastic, rectangular airtight container for food in which during the manufacture of the container, the flow of the molten plastic liquid is caused to occur smoothly and uniformly in every direction, and the weld line which is produced in the body portion has no influence on the strength of the hinge device since the hinge portion is avoided.
Accordingly, the present invention is directed to a plastic, rectangular airtight container for food which comprises
a rectangular container main body in which length of one side is longer than other side;
a plurality of locking projections including one or two projections formed at the four sides of the container main body, respectively, but two are formed with a predetermined distance from one another along the long side;
a lid having locking wing portions provided with locking holes for receiving the locking projections, and wherein the locking wing is rotatably connected. by a hinge portion to the lid;
and a packing which is mounted to top cover piece of the lid for hermetically sealing the container main body;
wherein a molten liquid flow intercepting hole for forming a gorge between locking holes is formed at two places, to the right and left of the locking wing piece, so that the plastic molten liquid is caused to flow to both sides of the gorges by bypassing the molten liquid flow intercepting hole.
Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.
FIG. 1 is a view showing a lid of a plastic, rectangular, airtight container for food in accordance with the present invention;
FIG. 2 is a cross sectional view of the lid of FIG. 1 in accordance with the invention; and
FIG. 3 is a view showing the rectangular, airtight container of the present invention which is hermetically sealed by a lid.
In the drawings, reference numeral 1 is a rectangular, airtight container which consists of a lid 2 and a container main body 3.
The container main body 3 has a rectangular configuration, in which the length of one side is longer than the other side, and the lid 2 and the container main body 3 are made by injection molding with a plastic material (including silicon).
The lid 2 consists of top cover surface 4, and locking wing pieces 5 extending in every direction from the top cover surface 4. The locking wing pieces 5 are made to be connected to the top cover surface 4 by a hinge 6 which is thinner in thickness relative to other portions so that the locking wing pieces 5 are provided with a bendable or rotatable movement using the hinge 6.
The locking holes 7 a, 7 b (they are represented by reference numeral 7 when expressing as representative) are formed in which the length l is longer than the width b.
For the locking hole 7, at least two holes 7 a, 7 b are formed at both sides of the locking wing piece 5, and a molten liquid flow intercepting hole 8 is formed between said two locking holes 7 a, 7 b.
Gorges 9 a, 9 b are formed between the molten liquid flow intercepting hole 8 and the locking holes 7 a, 7 b, located at both sides thereof.
And, locking projections 10 a, 10 b (depicted by reference numeral 10 when representatively expressed) are respectively formed to project in every direction from the top portion of the container main body 3 from positions confronting the locking holes 7 a, 7 b.
Accordingly, when the locking wing piece 5 is pressed toward the locking projections 10, the locking holes 7 engage the locking projections 10 and the lid 2 is assembled and locked to the container main body 10. A packing 12 is provided in groove 11 to hermetically seal the container main body 3.
In accordance with the present invention, since a molten liquid flow intercepting hole 8 is formed in the locking wing piece 5 of the lid 2, gorges or channels 9 a, 9 b are formed to facilitate the injection molding operation which is to be utilized.
A shape identical with that of the lid 2 is formed as a cavity for the metal mold. When plastic molten material is poured through the molten liquid pouring gate 15 formed in the metal mold at a central position of the lid 2, the molten resin spreads out to every direction.
At this moment, when the molten liquid spreading from the molten liquid pouring gate 15 reaches the molten liquid flow intercepting hole 8 nearest to the gate 15, the flow bypasses the intercepting hole 8 after being blocked by the intercepting hole 8. Both sides of the intercepting hole 8 form with the locking holes 7 a, 7 b, narrow channels 9 a, 9 b, a flow of the molten liquid is not smooth, and when passing the gorge 9, a pressing portion (5 a, a portion to be pressed by hand when shutting the lid) of broad area is appeared, and a time is required for which the molten liquid fills the pressing portion 5 a and flows to both ends 5 b of the locking wing piece 5.
Because the flow of molten liquid is delayed when passing through the channels 9 a, 9 b, and even through the distance from the molten liquid pouring gate 15 to both ends 5 b, 5 b of the locking wing piece 5 is farer away than the distance to the molten liquid flow intercepting hole 8, the molten liquid passing through the channels 9 a, 9 b and thereof both ends 5 b, 5 b meet at the location of reference numeral 16 as shown, so that weld lines 17, 17 are formed at reference numeral 16 and not at both ends 6 a, 6 a of the hinge 6. Because the weld line 17 is formed at reference numeral 16 and not at the hinge location 6 a, the hinge 6 a is not damaged and originally designed life of the hinge can be maintained, even if the locking wing piece 5 is repeatedly folded and unfolded for long period of time.
When the molten liquid flow intercepting hole 8 is formed to be long in length, relative to its width, and when it is formed along the hinge line 6, the entire length of the hinge 6 is shortened and thus the resilient force required to operate the locking wing piece 5 is decreased, thereby making the assembling of the lid easy. Also, the stress to the hinge 6 is decreased whereby damage due to bending of the hinge 6 is decreased.
Also, as shown in FIG. 3, a portion 18 of the lid is recessed so that damages to the lid due to contact among containers when stacking is prevented. Also, the portion 18 can be formed to be coarse and opaque by sand blasting to the metal mold used in the injection molding process, accordingly, if the lid is inadvertently scratched, the rough surface conceals, the problem.
Thus in accordance with the present invention, a molten liquid flow intercepting hole is formed between two locking holes formed in the locking wing of a rectangular, airtight container whereby a channel is formed so that the flow of the molten material, such as silicon or a special synthetic resin is coordinated so that the weld line is formed which avoids the hinge portion of the lid which is thin and made weak by repeated bending stress. Thus, the life can be extended which inherently extends the life of the container.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3688942 *||Nov 20, 1970||Sep 5, 1972||Continental Can Co||Container and closure combination|
|US3817419 *||Feb 22, 1972||Jun 18, 1974||Continental Can Co||Latch to secure a closure on a container|
|US4603809 *||Feb 21, 1985||Aug 5, 1986||Seprosy Societe Europeenne Pour La Transformation Des Produits De Synthese||Package with a base and a cover, especially for foodstuffs such as eggs|
|US4721056 *||Jul 23, 1987||Jan 26, 1988||Steeley Larry J||Visual indicator cap for a telecommunication cable terminal pedestal|
|US5348181 *||Dec 30, 1992||Sep 20, 1994||James River Corporation Of Virginia||Winged cup lid|
|US5538154 *||Jun 14, 1993||Jul 23, 1996||Von Holdt; John W.||Snap-on, flexible lid|
|US6220507 *||Jan 13, 1999||Apr 24, 2001||Groupe Guillin||Packaging box for food products|
|US6253952 *||Oct 13, 1999||Jul 3, 2001||Ignacio Vial B.||Closure means for packaging boxes|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6698608||Oct 31, 2001||Mar 2, 2004||Pelican Products, Inc.||Protective case|
|US6712259 *||Feb 15, 2000||Mar 30, 2004||Armor Inox||Method for assembling sheet metals and rigid structure obtained by said method|
|US6793096 *||Oct 7, 2003||Sep 21, 2004||Hana Cobi Co., Ltd.||Food item receiving container|
|US6953126||Nov 21, 2003||Oct 11, 2005||Pelican Products, Inc.||Protective case|
|US7255228 *||Nov 19, 2004||Aug 14, 2007||Hana Cobi Co., Ltd.||Cellular phone casing with melted liquid flow disconnection hole along hinge line|
|US7624891 *||Jun 13, 2005||Dec 1, 2009||Paul Appelbaum||Plastic package with card cover and flip-up card retainers|
|US7696711||Nov 3, 2006||Apr 13, 2010||Graco Children's Products Inc.||Diaper pail|
|US7803859||Dec 15, 2005||Sep 28, 2010||Zinus, Inc.||Nano-silver infused container arrangements|
|US7854344 *||Sep 29, 2008||Dec 21, 2010||Suk Jong Cheul||Lid having locking flap handles with improved elastic hinges for airtight containers|
|US7882974||Jan 9, 2006||Feb 8, 2011||Waddington North America, Inc.||Food container assembly with integral hinge/latch combination and method therefor|
|US7997412||Sep 17, 2009||Aug 16, 2011||Wilton Industries Inc.||Dry ingredients container|
|US8245867 *||May 16, 2007||Aug 21, 2012||Allen Tool Company, Inc.||Container and closure assembly|
|US8273812||Aug 5, 2010||Sep 25, 2012||Zinus, Inc.||Nano-silver infused container arrangements|
|US8376181||May 21, 2010||Feb 19, 2013||Wki Holding Company, Inc.||Container assembly with flexible lid seal and releasing arrangement|
|US8490810||Oct 20, 2006||Jul 23, 2013||Snapware Corporation||Method of merchandising modular home storage containers to allow consumers to maximize storage space|
|US8534492 *||Apr 1, 2011||Sep 17, 2013||Wki Holding Company, Inc.||Container with air-tight lid|
|US8657799||Nov 7, 2011||Feb 25, 2014||Georgann M. Carrubba||Ostomy appliance and method|
|US8678212 *||Aug 27, 2004||Mar 25, 2014||Sunrise Kitchen Co., Ltd.||Container and container cover for sealing the container opening|
|US8714394 *||Jan 30, 2012||May 6, 2014||Emsa Gmbh||Storage container having locking lid|
|US8720718||May 13, 2008||May 13, 2014||Nancy O. Myers||Foldable carrying case|
|US8733550||Mar 9, 2012||May 27, 2014||Wki Holding Company, Inc.||Nesting container lids with snap on wings|
|US8899443||Dec 15, 2009||Dec 2, 2014||Wki Holding Company, Inc.||Container assembly with flexible seal|
|US8985385||Apr 20, 2009||Mar 24, 2015||Pelican Products, Inc.||Sealed protective case with liner and latch|
|US9187223||Apr 18, 2014||Nov 17, 2015||Wki Holding Company, Inc.||Nesting container lids with snap on wings|
|US9663276||May 18, 2015||May 30, 2017||Wki Holding Company, Inc.||Compressible seal member for container|
|US9694951||Jul 3, 2014||Jul 4, 2017||Kittrich Corporation||Reclosable elastomeric fastener|
|US9757270||Feb 9, 2015||Sep 12, 2017||Tencar Inc.||Ostomy appliance|
|US20040084464 *||Oct 17, 2003||May 6, 2004||Koo Cha-Ii||Airtight container|
|US20040099497 *||Nov 21, 2003||May 27, 2004||Parker David H.||Protective case|
|US20050035125 *||Aug 6, 2004||Feb 17, 2005||Seok Soon Bae||Fastening structure of airtight container|
|US20050139604 *||Feb 9, 2004||Jun 30, 2005||Kim Chang-Ho||Non-plastic container for storing food|
|US20050155889 *||Jan 20, 2004||Jul 21, 2005||Lown John M.||Modular and stackable tray assembly|
|US20050230395 *||Jun 14, 2005||Oct 20, 2005||Parker David H||Protective case|
|US20060021889 *||Nov 19, 2004||Feb 2, 2006||Hana Cobi Co., Ltd.||Cellular phone casing|
|US20060037882 *||Oct 14, 2003||Feb 23, 2006||Paul Appelbaum||Package with snap-lock lid|
|US20060078411 *||Oct 6, 2005||Apr 13, 2006||Maria Casab||Mountable refuse container|
|US20060157483 *||Jan 9, 2006||Jul 20, 2006||Waddington North America, Inc.||Food container assembly with integral hinge/latch combination and method therefor|
|US20060278651 *||Jun 13, 2005||Dec 14, 2006||Paul Appelbaum||Plastic package with card cover and flip-up card retainers|
|US20070023434 *||Aug 27, 2004||Feb 1, 2007||Sang-Kee Kim||Container cover|
|US20070095849 *||Oct 31, 2006||May 3, 2007||Hana Cobi Co., Ltd.||Sealed container lid of vacuum valve operation type|
|US20070125792 *||Nov 3, 2006||Jun 7, 2007||Graco Children's Products Inc.||Diaper pail|
|US20070137500 *||Dec 15, 2005||Jun 21, 2007||Ok Gil S||Nano-silver infused container arrangements|
|US20070142533 *||Dec 15, 2005||Jun 21, 2007||Gil Sun Ok||Nano-silver infused polymeric composition and methods of manufacturing the same|
|US20080105630 *||Oct 20, 2006||May 8, 2008||Lown John M||Method of merchandising modular home storage containers to allow consumers to maximize storage space|
|US20080283527 *||May 16, 2007||Nov 20, 2008||Allen Tool Company, Inc.||Container and closure assembly|
|US20090200300 *||Apr 20, 2009||Aug 13, 2009||Pelican Products, Inc.||Protective case|
|US20090218360 *||Sep 29, 2008||Sep 3, 2009||Suk Jong Cheul||Lid for Airtight Containers|
|US20100072100 *||Sep 17, 2009||Mar 25, 2010||Wilton Industries, Inc.||Dry ingredients container|
|US20100147846 *||Dec 15, 2009||Jun 17, 2010||Randy Soibel||Container Assembly With Flexible Seal|
|US20100200588 *||Mar 5, 2007||Aug 12, 2010||The Glad Products Company||Vacuum storage container|
|US20100221393 *||Mar 21, 2006||Sep 2, 2010||Loong Keng Lim||Resealable, Reusable Plastic Storage Container and Lid With Gas-Permeable Membranes for Modified Storage of Food and Perishables|
|US20100237070 *||Nov 20, 2008||Sep 23, 2010||Coonce Ryan J||Storage container|
|US20100294695 *||Aug 5, 2010||Nov 25, 2010||Zinus Inc.||Nano-Silver Infused Container Arrangements|
|US20110042382 *||Aug 10, 2010||Feb 24, 2011||Peggy Lynne Vazzano||S'mores Ingredients Storage Container With Airtight Lid|
|US20120248116 *||Apr 1, 2011||Oct 4, 2012||Justin Smyers||Container with air-tight lid|
|US20130306636 *||Jan 30, 2012||Nov 21, 2013||Emsa Gmbh||Storage container set|
|US20150260376 *||Jan 2, 2015||Sep 17, 2015||Samsung Electronics Co., Ltd.||Light emitting diode module lens and light emitting diode module lighting apparatus|
|USD673807||Mar 10, 2012||Jan 8, 2013||Wki Holding Company, Inc.||Container lid|
|USD673808||Mar 10, 2012||Jan 8, 2013||Wki Holding Company, Inc.||Container lid|
|USD675057||Mar 9, 2012||Jan 29, 2013||Wki Holding Company, Inc.||Lid|
|USD704503||Nov 28, 2012||May 13, 2014||Sistema Plastics Limited||Lid for a container|
|USD706084||Nov 28, 2012||Jun 3, 2014||Sistema Plastics Limited||Lidded container|
|CN103879650A *||Apr 18, 2014||Jun 25, 2014||苏州市冯氏实验动物设备有限公司||Experimental animal cage with novel lock catch structure|
|WO2007106676A3 *||Mar 5, 2007||Dec 4, 2008||Glad Products Co||Vacuum storage container|
|WO2014125489A1||Feb 13, 2014||Aug 21, 2014||Curver Luxembourg Sarl||Nestable storage container having an integrally hinged lid|
|U.S. Classification||220/788, 220/326|
|International Classification||B65D45/20, B65D43/02, B29C45/00, B65D6/00|
|Cooperative Classification||B65D2543/00972, B29C45/0081, B65D45/20, B65D43/0218, B65D2543/00296, B65D2543/00194, B29C45/0025, B65D2543/005, B65D2543/00555|
|European Classification||B29C45/00K, B65D43/02S5B, B65D45/20, B29C45/00G|
|Sep 21, 2000||AS||Assignment|
Owner name: HANA COBI CO., LTD., KOREA, REPUBLIC OF
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, CHANG-HO;REEL/FRAME:011129/0445
Effective date: 20000901
|Dec 16, 2005||FPAY||Fee payment|
Year of fee payment: 4
|Oct 29, 2008||AS||Assignment|
Owner name: LOCK & LOCK CO., LTD., KOREA, REPUBLIC OF
Free format text: MERGER;ASSIGNOR:HANA COBI CO., LTD.;REEL/FRAME:021754/0399
Effective date: 20070831
|Dec 9, 2009||FPAY||Fee payment|
Year of fee payment: 8
|Dec 27, 2013||FPAY||Fee payment|
Year of fee payment: 12